[PATCH 2/2][RFC] ep93xx pcmcia support for the ads sphere board

[Lennert Buytenhek]

Signed-off-by: Lennert Buytenhek <buytenh at wantstofly.org>

Index: linux-2.6.19/drivers/pcmcia/Makefile
===================================================================
--- linux-2.6.19.orig/drivers/pcmcia/Makefile
+++ linux-2.6.19/drivers/pcmcia/Makefile
@@ -55,6 +55,8 @@ au1x00_ss-$(CONFIG_MIPS_DB1500)			+= au1
 au1x00_ss-$(CONFIG_MIPS_DB1550)			+= au1000_db1x00.o
 au1x00_ss-$(CONFIG_MIPS_XXS1500)		+= au1000_xxs1500.o
 
+ep93xx_cs-$(CONFIG_MACH_ADSSPHERE)		+= ep93xx_adssphere.o
+
 sa1111_cs-y					+= sa1111_generic.o
 sa1111_cs-$(CONFIG_ASSABET_NEPONSET)		+= sa1100_neponset.o
 sa1111_cs-$(CONFIG_SA1100_BADGE4)		+= sa1100_badge4.o
Index: linux-2.6.19/drivers/pcmcia/ep93xx_adssphere.c
===================================================================
--- /dev/null
+++ linux-2.6.19/drivers/pcmcia/ep93xx_adssphere.c
@@ -0,0 +1,167 @@
+/*
+ * linux/drivers/pcmcia/ep93xx_adssphere.c
+ * Copyright (C) 2005 Robert Whaley <rwhaley at applieddata.net>
+ *
+ * Adapted from pxa27x_mainstone.c, which is:
+ *   Copyright (C) 2004 MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <pcmcia/ss.h>
+#include <asm/io.h>
+#include <asm/hardware.h>
+#include <asm/irq.h>
+#include <asm/mach-types.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/adssphere.h>
+#include "soc_common.h"
+
+#define EP93XX_GPIO_PFDR	EP93XX_GPIO_REG(0x30)
+
+#define PCMCIACNT		(EP93XX_PCMCIA_CONTROLLER_BASE + 0x40)
+
+
+static struct pcmcia_irqs irqs[] = {
+	{ 0, IRQ_EP93XX_GPIO(EP93XX_GPIO_LINE_MCCD1),  "PCMCIA CD1" },
+	{ 0, IRQ_EP93XX_GPIO(EP93XX_GPIO_LINE_MCCD2),  "PCMCIA CD2" },
+	{ 0, IRQ_EP93XX_GPIO(EP93XX_GPIO_LINE_MCBVD1), "PCMCIA STSCHG/BVD1" },
+	{ 0, IRQ_EP93XX_GPIO(EP93XX_GPIO_LINE_MCBVD2), "PCMCIA SPKR/BVD2" },
+};
+
+static int adssphere_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+	if (skt->nr == 0) {
+		skt->irq = IRQ_EP93XX_GPIO(EP93XX_GPIO_LINE_READY);
+		return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
+	}
+
+	return -ENXIO;
+}
+
+static void adssphere_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
+{
+	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
+}
+
+static void adssphere_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
+					  struct pcmcia_state *state)
+{
+	unsigned long status;
+
+	status = readl(EP93XX_GPIO_PFDR);
+	state->detect = (status & 0x06) ? 0 : 1;
+	state->ready  = (status & 0x40) ? 1 : 0;
+	state->wrprot = (status & 0x01) ? 0 : 1;
+	state->bvd1   = (status & 0x08) ? 1 : 0;
+	state->bvd2   = (status & 0x10) ? 1 : 0;
+	state->vs_3v  = (status & 0x20) ? 0 : 1;
+	state->vs_Xv  = (status & 0x80) ? 0 : 1;
+}
+
+static int adssphere_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+					     const socket_state_t *state)
+{
+	unsigned long clrbits;
+	unsigned long setbits;
+
+	if (skt->nr != 0) {
+		printk(KERN_ERR "%s: socket %u invalid\n", __func__, skt->nr);
+		return -1;
+	}
+
+	clrbits = 0;
+	setbits = 0;
+
+	switch (state->Vcc) {
+	case 0:
+		clrbits = ADSSPHERE_CR0_CF_33 | ADSSPHERE_CR0_CF_50;
+		setbits = 0;
+		break;
+
+	case 33:
+		clrbits = ADSSPHERE_CR0_CF_50;
+		setbits = ADSSPHERE_CR0_CF_33;
+		break;
+
+	case 50:
+		clrbits = ADSSPHERE_CR0_CF_33;
+		setbits = ADSSPHERE_CR0_CF_50;
+		break;
+
+	default:
+		printk(KERN_ERR "%s: bad Vcc %u\n", __func__, state->Vcc);
+		return -1;
+	}
+
+	writel((readl(ADSSPHERE_CR0) & ~clrbits) | setbits, ADSSPHERE_CR0);
+
+	if (state->flags & SS_RESET)
+		/* see EP93xx User's Guide */
+		writel(0x15, PCMCIACNT);
+	else
+		/* CF mode -  BIT1 for PCMCIA mode */
+		writel(0x11, PCMCIACNT);
+
+	return 0;
+}
+
+static void adssphere_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
+{
+	soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
+}
+
+static void adssphere_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
+{
+	soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
+}
+
+static struct pcmcia_low_level adssphere_pcmcia_ops = {
+	.owner			= THIS_MODULE,
+	.hw_init		= adssphere_pcmcia_hw_init,
+	.hw_shutdown		= adssphere_pcmcia_hw_shutdown,
+	.socket_state		= adssphere_pcmcia_socket_state,
+	.configure_socket	= adssphere_pcmcia_configure_socket,
+	.socket_init		= adssphere_pcmcia_socket_init,
+	.socket_suspend		= adssphere_pcmcia_socket_suspend,
+	.nr			= 1,
+};
+
+static struct platform_device adssphere_pcmcia = {
+	.name		= "ep93xx-pcmcia",
+	.id		= -1,
+	.dev		= {
+		.platform_data	= &adssphere_pcmcia_ops,
+	},
+};
+
+static int __init adssphere_pcmcia_init(void)
+{
+	int ret;
+
+	ret = 0;
+	if (machine_is_adssphere())
+		ret = platform_device_register(&adssphere_pcmcia);
+
+	return ret;
+}
+
+static void __exit adssphere_pcmcia_exit(void)
+{
+	if (machine_is_adssphere())
+		platform_device_unregister(&adssphere_pcmcia);
+}
+
+module_init(adssphere_pcmcia_init);
+module_exit(adssphere_pcmcia_exit);
+
+MODULE_LICENSE("GPL");
Index: linux-2.6.19/include/asm-arm/arch-ep93xx/adssphere.h
===================================================================
--- linux-2.6.19.orig/include/asm-arm/arch-ep93xx/adssphere.h
+++ linux-2.6.19/include/asm-arm/arch-ep93xx/adssphere.h
@@ -8,6 +8,8 @@
 
 #define ADSSPHERE_CPLD_REG(x)		(ADSSPHERE_CPLD_VIRT_BASE + (x))
 #define ADSSPHERE_CR0			ADSSPHERE_CPLD_REG(0x00)
+ #define ADSSPHERE_CR0_CF_33		0x01
+ #define ADSSPHERE_CR0_CF_50		0x02
 #define ADSSPHERE_CR1			ADSSPHERE_CPLD_REG(0x04)
  #define ADSSPHERE_CR1_CODEC_POWER	0x20
  #define ADSSPHERE_CR1_AMP_POWER	0x10